Polyethyleneimine cured epoxy-modified paper

ABSTRACT

PROCESS FOR PRODUCING EPOXY-MODIFIED PAPER BY A CHEMICAL REACTION ON A CONVENTIONAL PAPER MACHINE BY ADDING AT SEPARATE POINTS IN THE PAPERMAKING PROCESS UPSTREAM OF A HEATING SECTION A HIGH MOLECULAR WEIGHT, POLYETHYLEINEIMINE WHICH IS SUBSTANTIVE TO PAPER AND ADDING AT A SEPARATE POINT AN AQUEOUS DISPERSION OF AN UNREACTED EPOXY RESIN SUCH AS VINYL CYCLOHEXANE DIOXIDE WHICH IS CURABLE BY SAID POLYETHYLENEIMINE.



